Swimming pool



F. E. HARTMAN SWIMMING POOL Dec. 1, 1925;

Filed April 22, 1922 2 Sheets-Sheet 1 I N vE/vTaR' FEB a1? ArroRNE )2Dec. 1, 1925.

F, E. HARTMAN SWIMMING POOL Filed April 22. 1.922

2 Sheets-Sheet 2 Patented Dec. 1, 1925.

UNITED STATES PATENT OFFICE.

WATER STERILIZER AND OZONE COMPANY, OF SCOTTDALE, PENNSYLVANIA, A

CORPORATION OF PENSYLVANIA.

SWIMMING POOL.

Application fl led April 22, 1922. Serial No. 558,051.

To all whom it may concern:

Be it known that I, FRANK E. HARTMAN, citizen of the United States,residing at Scottdale, in the county of Westmoreland and State ofPennsylvania, have invented certain new and useful Improvements inSwimming Pools, of which the following is a specification.

This invention relates to an improvement in swimming pools and moreparticularly to a novel circulating system for maintaining the water inthe pool at a maximum degree of purity and also of even temperaturethroughout. In swimming pools used by a large number of bathers, it isnecessary to provide means for maintaining the water at a high standardof purity, and in pools of large capacity it is desirable to reuse thewater to obviate a large economic Waste. As the impurities in the poolof water float or rise near the surface and the bathers are in contactwith the surface water more frequently than at lower levels, it becomesnecessary to insure that the surface water is constantly removed andreplaced by purified water which is distributed in the pool in such amanner that all of the water in thepool is kept in circulation, therebynot only insuring the desired standard of purity but also maintainingsafe temperature conditions.

The present invention aims to provide a novel apparatus for circulatingand purifying the water of the pool in the manner set forth in mycopending application Serial No. 556,049, filed April 22, 1922, whereinit'is proposed to supply the fresh water at the bottom of the pool sothat the circulation of all the water in the pool is upward- -ly fromthe bottom and outwardly toward the edges. In that connection thepresent improvement contemplates an apparatus for positively includingall of the water of the pool in a closed circuit without de ending onthe water being returned throug 1 the overflow rail as distinguishedfrom my copending application Serial No. 556,050, filed April 22, 1922,thereby adapting the present apparatus to installations where the sumpdevice of my said appl cation Serial No. 556,050 cannot be convenientlyused.

A further object of the invention is to provide simple and practicalmeans for maintaining the water in the pool at maximum capacity at alltimes to insure the free circulation of the water from the pool to andthrough the filtering, heating and purifying instrumentalities prior toits passage into the pool.

With the above and other objects in view which will more readily appearas the naproved system.

Fig. 2 is a top plan view of .the pool showmg the piping arrangement.

Fig. 3 is a longitudinal sectional view taken on the line 33 of Fig. 2.

v Fig. 4 is a transverse sectional view taken on the line 4-4 of Fig. 3.I

Similar reference characters designate corresponding parts throughoutthe several figures of the drawings.

In carrying the resent invention into effect, it 1s ropose to equip thepool A with the in uent pipin system B and the efiluent piping systemthe latter leading to a suitable pumping device D for positivelymaintaining the circulation of water from the pool to the filter unitsE, which in turn communicate with a heater F connected by suitablepiping F with an ozonizer unit G. From the ozonizing unit, the purifiedwater is conveyed through the pipe H to the influent s stem B.

As Wlll. be observed from the drawings,

the influent piping B is arran ed at the bottom of the 001, while theefiihent piping is arranged a jacent the upper ed e thereof andcommunicates with the interior of the pool at a point adjacent to andbelow the overflow trou h T, as will presentlv appear. The path of t 1ewater in its passage through the 001 is therefore from the bottom upwartoward the outer edges of the pool,

simply serves to carry to waste the water which is displaced by bathersentering the pool. a

Another novel and distinctive feature of the present improvement (is thenovel supply unit Swhich provides for maintainin the water of the poolat the 'predetermine capacity to maintain the effectiveness of thecirculating system. When the bathers enter the pool, the water displacedby their presence becomes lost throu h the overflow trough and alsoconsidera is water is carried away by the bathers and a certainproportion evaporates. To make up for this loss the supply unit Sautomatically operates when the level of the pool falls below a certainpoint to supply the system with additional fresh water at a point in thecircuit anterior to the pumping, filtering, heatv 30- ingaand purifyinginstrumentalities.

eferrmg now more particularly to the details of construction forcarrying the invention into effect, it will be observed that theinfluent piping system B preferably includes a supply pipe 1 surroundingthe bottom of the tank and having a lurality of ofiset su ply pipes 2having disc ar e ports 3 suitab y distributed and located t rough- V outthe bottom of the tank. The pipe 1 connects with the piping H from theozonizer and distributes the heated and purified water to the bottom ofthe pool.

The efiiuent piping C at the top of the pool preferably consists of acommon receivmg pipe- 4 having a plurality of laterall extendingreceiving pipes 5 which project IOIlzontally through the side walls ofthe pool to communicate as at 6 with the interior of the pool around theupper side edges thereof and below the mean water level. By distributingthe outlets of the efiluent pipmg and the inlets of the influent piping,as shown in the drawings, the pressures are equalled so that more waterwill not enter at one point than at another.

As W111 be observed from Figure 1, the common discharge pipe 4 of theefiluent i mg C communicates with a pipe 7 whic in turn is connectedwith a pipe section 8 having therein a check valve 9 and a fresh watersupply connection 10 leading from the supply unit S. The said freshwater supply pipe 10 communicates with an automatic valve 11 located inthe main sup 1 line 12 which may have therein a suitifiale manuallyoperated cut-off valve 13 if desired.

, of a predetermine In connection with the supply unit S. which includesthe pipe 10 communicatinfi with the source of water supply 12, it wi beobserved that the valve 11 is of any suitable electro-magnetic typewhich .is normally closed, but 0 erates at the occurrence.

condition to open the supply line to the ipe 10. As shown in thedrawing, the said valve 11 preferably includes a suitable electro-magnethousing 14 having the wiring connections 15 leading to a terminalelement 16 arranged within a stand pipe 17 which communicates throu 'hthe connection 18 directl with the pool K. Within the pipe 17 asuitablefloat 16' is provided so that when the water in the pool A drops belowthe predetermined level established by the inlet orifices of theinfluent piping O, the said float will close the circuit to theterminals 16 and operate the electro-magnetic valve to ermit water fromthe supply line 12 to ow into the pipe connection 10.

lo prevent the pressure of the waterm the line 10 from backing up intothe pool without oing through the pump device D and the f lltermg,heating and purifying Instrumentalities, the check valve 9, previouslyreferred to, is provided. Obviously, the operation of the pump will drawwater through the efliuent system C and through the plpes 7 and 8 aslong as the water 1n the 001 A is above the level of the inlets 6 of t eefiluent system but when the water falls below the inlets the float 16will operate the valve 11 to permit fresh water to flow into the pipe 8.As the water supplied through the ipe 12 is usually from city mainsunder igh pressure, it mi ht make its wa in the pool through the e uentiping i it were not for the checkvvalve 9. owever, this valveeffectually guards against such occurrence and the device is thusinsured of positive operation at all times without attention.

From the foregoing it is thought that it will be apparent that thepresent invention rovides novel means for causing the positlvecirculation of water in the pool and effectually provides forreplenishin the suppl when the same falls below a prefetermine level.

While it will of course be understood thatvarious changes may beresorted to in carrying the invention into effect, it will of course beunderstood that the primary and underlying features of the invention,heretofore pointed out, are adhered to.

1. A circulating system for swimmIi-ng pools including in combination,an overflow trough surrounding the pool, an influent piping s stemarranged at the bottom of the pool an communicating therewith, aneflluent piping system arranged near the top of an e uent. piping systemcommunicating the pool and communicating therewith below the trough, andpi ing connections including a pump establis ing communication betweensaid systems. J v

2. A circulating system for swimming pools including in combination, anoverflow trough surrounding the pool, an influent pi ing system arrangedbeneath the pool, an e uent piping s stem communicating with the poolbelow t 1e trough, connections between said infiuent and effluent pipingsystems, said connections including filtering, heating and purifyingcirculating pump an an automatic float controlled valve for maintaining.the level of water in the pool above the inlets for the efliuentsystem. j

A circulating system for swimming pools. including in combination, anoverflow trough surrounding the pool, an infiuent pipin system arrangedbeneath the pool,

with the pool below the trough, pi ing coniiections between saidinfiuent an efliuent giping'systems, said connections including lte'ring, heating andpurifying instrumentalities, a circulating pump, a valvedfresh water supply pipe joining said connections ,between the pump andthe efliuentpiping system.

4; A circulating system for swimming pools including an influentpipin'gsystcm arranged beneath the pool, an efiluent piping systemcommunicating with the pool below the mean water level, connectionsbetween said mfluent and efiluent piping systems,

i said connections including filtering, heating and purifyinginstrumentalities, a circulatng pump, .a fresh water supplypipe joiningsaid connections between the pump and the eflluent piping system, and avalve 1n said fresh water supply pipe line ada ted to be automaticallycontrolled by the evel of water in the pool to open and close theinstrumentalities, a

said supply line, and a one-way check valve arrange in said ipingconnections between the point where t e fresh water supply joinstherewith and the influent piping system.

5. A circulating system ior swimming pools including an influent pipingsystem arranged at the bottom of the pool and havin a plurality, ofdischarge outlets distributed in the floor of the pool'to efiect uniformdistribution of the water supply to the pool, an efiiuent pilipingsystem conslsting of a common disc arge pipe having a plurality of inletconnections communicatmg with the pool below the mean water level,piping connections for joining said infiuent and eflluent systems, acirculating pump arranged in said piping connections, means forsupplying fresh water to said piping connections, and means operated bythe level of water in the pool for controlling said last mentionedmeans.

6. A circulating system for swimming pools including in combination, anoverflow trough surrounding the pool, an infiuent piping s stem arrangedat the bottom of the pool an communicating therewith, an efliuent'piping system arranged at the top of the pool and communicatingtherewith below the trough, piping connections establishingcomvmunication between said systems, a circulat- ,and beingresponsive tothe water level within the pool, between the overflow trough and theoutlets of the efiiuent system.

In testimony whereof I hereuntoaflix my signature.

\ FRANK E. HARTMAN.

